Oil burner



July 22', 1924. 1,502,228

M. A. ATTALLAH 0 IL BURNER Filed March 2'7, 192-3 III/1 115 111,111;

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Patented July 22, 1924.

UNlT-ED fiTATES MICHAEL A. ATTALLAH, or ronon'ro, on'raaio, CANADA.

OIL BURNER.

Application filed March 27, 1923-. Serial No. 628,107.

T all 2072-0922. it vim-y concern:

Be it known that l, Mrorrann A. ATTALLAH, of the city of Toronto, in thecounty of York, Province of Ontario, Canada, a subject of the King ofGreat Britain, have invented certain new and useful Improvements in OilBurners, of which the following is a specification.

" to burn liquid fuels and more particularly to devices capable ofburning heavy fuel oils and my object is todevise a burner of this typewhich is specially adapted for use with household heating plants, whichwill be safe, economical and efficient.

I attain my objects by means of the con structions hereinafter describedand illustrated in the accompanying drawings in which- Fig. l is a planview of av burner constructed in accordance with my invention showingthe same applied to the firepot of a furnace;

Fig. 2 a longitudinal section on a larger scale; and

Fig. 3 a front elevation of the burner showing its connections indiagrammatic form.

In the drawings like numerals of reference indicate corresponding partsin the different figures.

Referring particularly to Fig. 3, 1 is an oil tank from which leads theoil supply pipe 2 which leads to a float feed chamber 3, this float feedbeing of the type commonly employed for carburettors for internalcombustion engines 4 4 is a pipe leading from the carburettor to thefuelnozzle 5 of an atomizing fuel jet. 6 is the air nozzle of the fueljet, the fuel jet being formed as an integral casting. The outlet of thefuel nozzle is formed by a nipple 7 which may be formed on a short tube8 screwed into the casting of the fuel jet so that the nipple may beadjusted up and down relative to the air nozzle or turned. The nipple islaterally flattened so that the opening is a slit as shown particularlyin Fig. 1. In practice it is preferable that this slit be parallel tothe axis of the air nozzle, the oil thus issuing from the jet in a verythin stream which is readily picked up by the blast of air issuing fromthe air nozzle. With this arrangement I find that there is no oil dripdown the outside of the fuel nozzle as any oil tending to trickle downward is readily swept off the sides of the nipple by the force of theair current.

The air nozzle is connected with a pipe 9 which leads to a suitablesource of supply of air under pressure,- preferably a tank 10 in whichthe pressure may be maintained by means of a pump 11, which ispreferably driven by hydraulic or electric power. The air nozzle isthreaded into the fuel jet so that it may be adj 'usted to and from thefuel nozzle 5, as shown in Fig. 2.

An automatic valve 12 is preferablyprovided in the pipe 9 as well as amanually operated valve 13 by means of which the air supply to the airnozzle may be regulated. The automatic valve is adapted to automaticallyclose as soon as air ceases to flow through the pipe, and to remainclosed until manually reset. The body of the automatic valve is providedwith the inlet and outlet openings 16 and 17. the latter being locatedbelow the inlet opening. To cut off the supply of air which normallypasses through the outlet opening a valve disk 18 is provided. The stem19 of this valve is axially movable in aplug 20, which is threaded inthe valve body in 'alinement with the outlet opening and at the upperside of the inletv opening so that the valve will fall by means ofgravity below the inlet opening and seat itself on the portion of theair supply pipe 9 which is threaded in the outlet opening. The plug 20is provided with a plurality of holes 21 communicating with the interiorof the valve body and the atmosphere. Assuming the valve to be manuallyraised and held in its open position above the inlet opening as the airpressure is turned on it is obvious that the latter will hold the valvein its open position but if for any reason the pressure of the airdecreases sufliciently to allow the valve 18 to drop below the inletopening the air will escape through the holes 21. This arrangement alsovisibly indicates by means. of the relative position of the end of thestem 19 projecting through the plug 20. whether the air is escaping ornot. The reason for this construction is that if the air supply fails.the jet of fuel is cut off sufficiently long for the fire to beextinguished so that it will not relight when the air pressure comes onagain, and if under these conditions the air supply to the fuel jet isrenewed, the furnace is soon filled with unburned oil. However, if theair supply remains out oif after it has once failed, no

oil flows into the furnace until the fire is relit and the valve 12re-opened. As the fuel nozzle is supplied by float feed, no oil willflow from it unless the air nozzle is in operation.

A very important feature of my invention is the combustion shell 14:.This may be formed of a metal casting or of any suitable refractory. Inits simplest form, it is shaped as a cross with openings 15 opposite oneanother and in alinement with the axis of the air nozzle 6 and lateralopenings 23 which are shown. directly opposite one another. The jet ofair and fuel from the fuel jet passes through the shell and by injectoraction air is drawn in to mingle with it both through the lateralopenings and the opening 15 nearest the fuel jet. The burningjet strikesa fire-brick wall 22, which protects the metal of the furnace and formsa heated radiant mass serving to heat by radiation the heat transferringsurfaces of the heater.

i It will be understood that any suitable fluid, such as steam, may besubstituted for the air for causing the atomizing of the fuel.

hat I claim is In oil burning apparatus the combina tion of an upwardlydirected fuel nozzle having its sides flattened and formed with a narrowslit like aperture parallel to the sides: and an air nozzlesubstantially at.

right angles'to and directed across the fuel" nozzle, the said flattenedsides of the fuel nozzle extending parallel to the axis of the airnozzle 'whereby Oll dripping down the sides of the fuel nozzle is sweptoff by the air current from the air nozzle.

Signed at Toronto, Canada, this 21 day of March, 1923.

MICHAEL A. ATTALLAH.

